Steel Structure

Common Specifications and Parameters of Steel Structures (Main Categories)

(I) H-beams (Main Load-Bearing: Core Material for Beams and Columns)

1. National Standard Material: Q235B, Q355B (Low Alloy High Strength, Commonly Used in Engineering)

2. Common Specifications (Height × Flange Width)

• Small: HW100×100, HM150×100, HN200×100

• Medium: HN300×150, HN350×175, HN400×200

• Large: HN500×200, HN600×200, HW400×400

3. Standard: GB/T 11263-2017

(II) I-beams / Channel Steel (Secondary Beams, Supports, Auxiliary Materials)

1. Material: Q235B

2. I-beam specifications: 10#, 12#, 14#, 16#, 18#, 20#, 25#, 30#

3. Channel steel specifications: 8#, 10#, 12#, 14#, 16#, 20#

(III) C/Z-shaped steel purlins (roofing, wall cladding)

1. Material: Q235 hot-dip galvanized (galvanized layer 60g~275g/㎡)

2. Common specifications

• C-shaped steel: C100×50×20×2.0, C120×50×20×2.5, C150×60×20×3.0

• Z-shaped steel: Z140×50×20×2.0, Z180×70×20×2.5

3. Thickness: 1.5mm–3.5mm

(IV) Color steel cladding panels (roofing panels/ Wall Panels

1. Material: Aluminum-zinc coated steel sheet, galvanized steel sheet

2. Thickness: 0.35mm–0.8mm

3. Types: 840 type, 900 type, 960 rock wool sandwich panel, 50/75/100mm flame-retardant rock wool sandwich panel

(V) General Technical Parameters of Steel Structures

1. Design Load: Conventional factory building 0.3–0.5KN/㎡ (roof live load)

2. Corrosion Resistance Rating: Ordinary indoor C2, outdoor/humid environment C3, chemical corrosion environment C4

3. Fire Resistance Rating: Class II/Class I building, fireproof coating thickness 1.5–3.0h

4. Connection Method: High-strength bolts (8.8 grade/10.9 grade), submerged arc welding, manual arc welding